바륨 헥사페라이트 및 코발트 페라이트 나노복합체의 및 교환결합 영구자석의 자기 특성

• 영문명: Magnetic properties of exchange-coupled permanent magnets based on barium hexaferrite and cobalt ferrite nanocomposites
• 발행기관: 한국세라믹학회
• 저자명: 윤상일(Sang-il Yoon) 김현승(Hyunseung Kim) 최지훈(Jihun Choi) 정창규(Chang Kyu Jeong)
• 간행물 정보: 『세라미스트』제27권 제3호, 323~334쪽, 전체 12쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2024.09.30

국문 초록

The strategy of blending hard and soft magnetic materials to synthesize nanocomposites offers new possibilities for magnetic materials. We focus on synthesizing and optimizing BaFe12O19-CoFe2O4nanocomposites using a co-precipitation method to enhance the magnetic properties through exchange coupling. The synthesis conditions including pH, annealing temperature, and blending ratio were systematically investigated. The precursor synthesized at pH 13 produced uniform precipitates, and upon annealing at 1000 °C, barium hexaferrite (BH) and cobalt ferrite (CF) with hexagonal and spinel structure were each formed. The nanocomposite with a blending ratio of 0.75BH-0.25CF exhibited enhanced saturation magnetization and the highest remanent magnetization compared to the individual components. The crystal structure, morphology, and magnetic properties were characterized using X-ray diffraction, field-emission scanning electron microscopy, and vibrating sample magnetometry.

목차

1. 서론

2. 본론

3. 결론

ACKNOWLEDGEMENTS

REFERENCES

키워드

Annealing temperature Co-precipitation Exchange permanent magnet Ferrite oxide Nanoparticle